gerdes



fitltitdl $121125 FREDERICK W. GERDES, OF ALLEGHENY O Y, PENNSYLVANIA.

Letters Patent No. 110,027, dated December 13, 1870.

3 IMPROVEMENT IN THE MANUFACTURE OF PAlNTS'.-

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it and concern:

Be it known that I, FREDERICK W. Gnnoss, of

Allegheny City, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvemeut in the Manufacture of Paint; and I do hereby declare the following to be a full, clear, and exact description thereof.

My improved paint is designed more particularly for painting carbon oil-barrels, or other articles subject to the action of such oil.

In the oil trade, thousands of barrels are required for barreling the refined oil, and a barrel adapted to such use must not only be lined inside with some nonsohible composition, but also be painted outside with some durable paint.

As linseed-oil is somewhat costly, efforts have been made to substitute for it beuzine or other of the lighter and less valuable products of the distillation of crude oil; but it has been found that unless a. considerable quantity of linseed-oil be used, the paint so made lacks the desired body, rubs oii' easily, and, as the proportion of linseed-oil is lessened, becomes more and more soluble by the carbon-oil.

After numerous experiments, I have found that the introduction of finely pulverized or powdered argillite or argillaceous shale 0r slate, into paint prepared wholl; or in part with benzine or other like distillate-and resin, as a substitute for linseed-oil, possesses the necessary body, is sufliciently adhesive and non-soluble to answer the uses referred to.

1 In manufacturing, I prepare the paint in any of the ways known to the art, and use any known materials except that, for about one-half by measure of the white lead or zinc or other white base commonly used, I substitute about an equal quantity, more or less, of finely pulverized or powdered argillite or argillaceous slate or shale, by doing which 1 am enabled to dis- =pense with a part or the whole of the linseed-oil commonly used, and substitute therefor benzme or other of the lighter and comparatively valueless products of the distillation of petroleum.

The benzine or other like distillate may be intro- (liltidtl at any desired stage of the manufacture, but I prefer to introduce it in the shape of resin-varnish,

which is made by dissolving resin in such distillate. h

If no linseed-oil be used, the white lead or zinc-white and the argillite, either separately or mixed together, may be ground in with the resin-varnish, or a small quantity of linseed-oil may be used in grinding, and the benzine or benziue-varnish be introduced afterward.

The coloring matter is introduced at any desired stage of the process, and the work otherwise carried on in the usual way.

In this way I produce apaint having the required body and hardness, and sufliciently adhesive and nonsoluble for the uses set forth.

But I do not limit my improvement to the use of the argillite in connection with the distillates referred to, since the desired quality of paint can be secured at a reduced cost by merely substituting powdered argillite for a port onof the white lead or zinc-white, and mixing them up with linseed-oil; but a still greater saving is effected by the use of henzine or other like distillate in connectionwith the argillite; as already set forth.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. Argillite or argillaceous slate, in combination with white lead or oxide of zinc, in the manufacture of paints, substantially as setforth.

2. lhe combination of argillite or argillaceous slate, Prussian blue or other equivalent blue pigment, while lead or zinc-white, and linseed-oil, so as to loima blue paint for oil-casks andother articles, substantially as set forth.

In testimony whereof, I, the said FREDERICK W. GEltDES, have hereunto set my hand.

FREDERICK W. GERDES.

Witnesses:

A. S. N lononsox, G; -1:1. Gumsiw. 

